Who is Stephen Paddock, the shooter killed in Las Vegas?

— Las Vegas authorities have named Stephen Paddock of Mesquite, Nevada, as the man who shot and killed at least 50 people at an outdoor concert at the Mandalay Bay Hotel and Casino in Las Vegas Sunday night.

The shooting took place at 10:08 p.m. as a concert by country singer Jason Aldean was ending. Authorities say they have confirmed at least 50 people were killed and more than 200 injured at the event which was on the last day of the three-day Route 91 Harvest Festival - a country music event.

LAS VEGAS, NV - OCTOBER 01: People scramble for shelter at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)(David Becker/Getty Images)

Here’s what we know about Paddock so far. Check back here for more updates:

He was 64.

He was in a room on the 32nd floor of the Mandalay Bay Hotel.

He was taken down at the scene. Authorities say they believe he killed himself.

According to Las Vegas Sheriff Joseph Lombardo, law enforcement "located numerous firearms" in Paddock's hotel room. Lombardo described the weapons as “rifles.”

Lombardo also confirmed two vehicles that were being searched for have been located.

It is believed to be the deadliest shooting in US history, with the death toll surpassing the 49 killed at a nightclub in Orlando in June 2016.